backdraft7 - 12:47 am on Dec 15, 2011 (gmt 0)
Over the past several years I have noticed more and more that a normal, smooth flow of quality traffic is becoming the exception rather than the rule. Daily "delta" is much more pronounced. Not sure of the cause, but today's slow down could indicate yet another minor algo update. I suspect in the past the updates were fewer and farther between. Now days it's a weekly if not affair.